/**
 * Copyright 2009-2015 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package org.apache.ibatis.reflection.property;

import java.lang.reflect.Field;

/**
 * @author Clinton Begin
 */
public final class PropertyCopier {

  private PropertyCopier() {
    // Prevent Instantiation of Static Class
  }

  /**
   * 通过属性进行对象属性拷贝
   * 只能在同类型或者继承
   * @param type 类型
   * @param sourceBean 数据源
   * @param destinationBean 目标源
   */
  public static void copyBeanProperties(Class<?> type, Object sourceBean, Object destinationBean) {
    Class<?> parent = type;
    while (parent != null) {
      final Field[] fields = parent.getDeclaredFields();
      for (Field field : fields) {
        try {
          // 字段设置可访问
          field.setAccessible(true);
          // 字段赋值
          field.set(destinationBean, field.get(sourceBean));
        } catch (Exception e) {
          // 只有遇到final 修饰的字段才会失败
          // Nothing useful to do, will only fail on final fields, which will be ignored.
        }
      }
      // 获取父类继续进行字段拷贝
      parent = parent.getSuperclass();
    }
  }

}
